Bow-turning machine.



G. A. ENSIGN.

BOW TURNING MACHINE- APPLICATION FILED JUNE 29. !911 1,268,703.. Patented June 4, 1918. v 6 SHEETS-SQEET lr' v v 1,

99 I: e M0 .212 m 0 F 1 i i [M Z0 /33 Z 22 m v I 1.71 70 M A/8858 lvrok J v 6201' ail Z G. A. ENSlGN.

BOW TURNlNG MACHINE- APPLICATION men JUNE29. 1911.

Patented June 4, 1918.

6 SHEET$SHEET 2.

' lawman WITNESSES Zdx We ac:

ATTORNEYS G. A. ENSIG'N.

BOW TURNING MACHINE. APPLICATION FILED JUNE 29. ml.

1,268,703. Patented June 4, 1918.

6 SHEETS-SHEET 3.

WITNESSES A TTUR/IIEYS G. A. ENSIGN.

BOW TURNING MACHINE. APPLICATION FILED JUNEIZQ, 1911.

Patented June 4, 1918.

6 SHEETSSHEET 4.

WWII/118858 G. A. ENSIGN.

BOW TURNING MACHINE.

APPLICATION HLED JUNE 29.1911

Patented J 11119 4, 1918.

6 SHEETS-SHEET 5.

INVENTOR 6 60/76 .1 17/255711 WITNESSES G. A. ENSIGN.

BOW TURNING MACHINE.

APPLICATION FILED JUNE 29, I917. Patented June 4,

6 SHEETS-SHEET 6 :mummmmm F .iZ. wmvsssss i7 INVENTOR I 71.; I M

' 4 TTORNEVS $1. D? a 2a)..

GEORGE A. ENSIGliT, OF DEFIA'NCE, OHIO, ASSTGNOR TO DEFIANGE MACHINE WORKS, OF DEFIANCE, OHIO, A CORPORATION OF OHIO.

BOW-TURNING- MACHINE.

Specification of Letters Patent.

Patented June 4, 1918.

Application filed June 29, 1917. Serial No. 177,714.

To all whom it may concern: 7

Be it known that I, Gnoecn A. ENsIcN, a citizen of the United States, and a resident of Defiance, in the county of Defiance and State of Ohio, have invented a new and Im proved Bow-Turning Machine, of which the following is a full,-cle ar, and eXact descripautomobiles, express wagons, carriages and othervehicles, with a view to insure proper fitting of the said bow members in sockets fixed on the vehicle bodies. Another object is to facilitate the placing of the bow, in position for turning and to enable the attendant to readily reach the controlling means of the machine without changing his posi tion.

In order to accomplish the desired result, use is made of revoluble cutter heads adapted to engage opposite sides of a side member of a bow to reduce such member and give it a tapering shape and an oval cross section, a pattern holder adapted to carry a pat-- tern and controlling the said cutter heads, a bow holder adapted to carry a bow to allow of imparting a swinging motion to the bow with the said holder as the fulcrum, and

. means connecting the bow holdcrwith the said pattern holder to turn the latter on imparting a swinging motion to the bow.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which.

similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a perspective view of the bow turning machine;

Fig. 2 is an enlarged plan view of the same with the protecting covers over the cutter heads removed and the bow and driving belts shown in section;

Fig. 3 is a longitudinal central section of the bow turning machine on the line 33 of Fig. 2; I

Fig. 4 is a cross section of the same on the line H of Fig. 3

Fig. 5 is a similar view of the same with the parts in operative position for reducing and shaping the side member of a bow;

Fig. 6 is a sectional plan view of the same on the line 66 of Fig. 4:;

Fig. 7 is a similar view of the same on the line 77 of Fig. 5;

Fig. 8 is a side elevation of one of the cutter heads and its cutter head carrier;

Fig. 9 is an enlarged cross section of the bow holder, the section being on the line .99 of Fig. 3; Fig. 10 is a side elevation of a portion of a bow showing a side member reduced and fashioned by the action of the bow turning machine;

. Fig. 11 is a side elevation of the pattern with the ends shown in section; and

Fig. 12 is an enlarged end view of the same.

The turning machine is mounted on a suitably constructed frame 20 provided on top with a transversely extending guideway21 on which are mounted to slide toward and from each other slides 22. On the top of construction and are adapted to move toward each other with a view to engage opposite sides of a side member 80 of a bow 31 to reduce such. side member 30 and to give 1t a tapering shape, and preferably an oval cross section, as will be readily understood by reference to Fig. 10. The terminal face of the side member 30 of the bow 31 engages a tail stock spindle 32 fastened by a set screw 33 in a tail stock 34: bolted or otherwise attached to the frame 20. The bend 35 of the bow 31 adjacent the side member 30 to be turned at the time is gripped between two gripping members and 41 mounted to slide transversely in a guideway 42 formed transversely on a head 43 bolted or otherwise fastened in a socket 4P1 on the end of a shaft 45 journaled in suitable bearings in a head stock 16 attached to the frame 20. The gripping members are provided at their bases with screw threads 47, 4:8 engaged by right and left hand screw threads 49, formed on the rod 51 mounted to turn in the head 43. Each outer end 52 of the rod 51 is made polygonal for the application of a wrench or other tool to enable the attendant to turn the rod 51 with a view to move the gripping members 40 and 41 toward or from each Other with a view to grip the bend 35 at opposite sides or to release the same when it is desired to remove the bow from the machine after its corresponding side member 30 has been turned and fashioned by the machine. The head 43 of the bow holder is provided with a longitudinally extending arm 55 provided at its free end with a set screw 56 adapted to engage the under side of the side bow member 30 adjacent the bend 35 to support the side member 30 in proper position for the cutter heads 26 to correctly reduce the side member. By the arrangement described the axis of the side member 30 of the bow coincides with the axis of the tail stock spindle 32 and the shaft 45 of the bow holder.

In order to permit of centrally engaging the end face of the member 30 with the point of the tail stock spindle 32, use is made of the following arrangement: A sup porting fork 60 is adapted to support the forward end of the member 30 prior to engaging the said member with the tail stock spindle 32, and this supporting fork 60 is adapted to be moved from its normal inactive position, shown in Fig. 3, to active position shown in dotted lines in Fig. 3. The tail stock spindle 32 extends through the opening in the fork 60 when the latter is in inactive position. The lower end of the fork 60 is secured by a set screw 61 to a rod 62 mounted to slide lengthwise in a bearing 63 formed on the tail stock spindle 34. The end of the rod 62 is connected with the upper end of a lever 64 fulerulned on a bracket 65 attached to the main frame 20, and the said lever is pressed 011 by a spring 66 to normally hold the supporting fork 60 in its inactive position. One end of the spring 66 is attached to 'the lever 64 and the other end of the spring is attached to a screw rod 67 held adjustable on the main frame 20 to allow of regulating the tension of the spring 66. The lower end of the lever 64 is pivotally connected with a longitudinally extending rod 68 mounted to slide in a bearing 69 formed on the head end of the frame 20 (see F 1), and the outer end of the rod 68 terminates in a button or a disk 70 adapted to be pressed on by the attendant in charge to impart a swinging motion to the lever 64 against the tension of its spring 66 with a view to move the fork 60 from the normal inactive position shown in full lines in Fig. 3 to the active supporting position shown in dotted lines in said Fig. 3. The sliding movement given to the rod 68 is limited by a stop collar 71 held adjustable on the rod 68 by a set screw 72, it being understood that the stop collar abuts against the outer face of the bearing 69 to limit the sliding movement of the rod 68 from the left to the right. l/Vhen the gripping jaws 40 and 41 are in open posi tion and the supporting fork 60 is in active position then the bow can be readily placed in position by resting the forward end of the member 30 in the fork 60 and passing the bend 35 between the gripping members 40 and 41 which are now closed by the operator turning the screw rod 51, as

previously explained, to firmly engage the gripping jaws 40 and 41 with the sides of the bend 35. The operator now advances the shaft 45 with a view to move the bow lengthwise and thusforce the end face of the bow member 30 into engagement with the pointed end of the tail stock spindle 32. In order to accomplish this advancing movement the following arrangement is made: The shaft 45 is provided with a reduced portion (see Fig. 3) on which is mounted to turn. loosely an exteriorly threaded sleeve 81 held between two collars 82 and 83 on the reduced end 80 of the shaft 45. The sleeve 81 is provided with a key 84 engaging a keyway 85' formed in the outer bearing of the head stock 46 to hold the sleeve Slagainst turning. On the sleeve 81 screws a nut 86 forming the hub of a hand wheel 87 under the control of the operator. The hub 86 fits between the bearings of the head stock and when the hand wheel 87 is turned in one direction then the sleeve 81 is moved from the left to the right and with it the shaft 45 to force the end face of the bow member30 into engagement with the tail stock spindle 32, as above explained. l Vhe-n it is desired to remove the bow from the machine the hand wheel 87 is turned in an opposite direction to move the shaft 45 from the right to the left and thereby disengage the end of the member 30 from the tail stock spindle 32.

The cutter heads are controlled from a pattern 90 to shape the bow member 30 accordingly, and this pattern 90 is preferably made of metal and is held at one end in a tail stock spindle 91 adjustably secured by a set screw 92 in a bearing 93 formed on the tail stock 34. The other end of the pattern 90 is provided with a rectangular recess 94 (see Figs. 11 and 12) engaged by a cone spondingly shaped pin 95 formed on the head 96 secured on the forward end of a shaft 97 journaled in suitable bearings 98 arranged on the head stock 46. On the shaft 97 is secured a gear wheel 99in mesh with a gear wheel 100 secured on the shaft 45 of the bow holder, the gear wheel 99 being sufficiently wide to allow shifting of the shaft 45, as previously explained, with out moving the gear wheel 100 out of mesh with the gear wheel 99. It will be noticed that when the bow is in position in the bow holder and a swinging motion is given to the bow in a transverse direction then the bow holder is turned and by the gearing described a corresponding turning movement is given to the pattern 90.

The pattern 90 is adapted to be engaged at opposite sides of two pairs of pins 110 and 111 adjustably held in bores in the cutter head carriers 23 by the use of set screws 112 and 113, as will be readily understood by reference to Figs. 4, 5, 6 and 7. In order to allow the pairs of pins 110 and 111 to engage the taperingsides of the pattern 90 it is necessary that the cutter head carriers 23 are free to turn in a horizontal plane, and for this purpose the sides of each cutter head carrier are provided with transversely extending rabbets 115 (see Figs. 6 and 7) fitting onto rabbeted arcuate sides 116 formed on the slides 22 to support the cutter head carriers 23 and allow the same to swing on the slides in a horizontal plane. Each of the cutter head carriers is pressed on by two springs 120 each secured at its inner end on a pin 121 held on the corresponding slide 22, while theouter end of the spring is attached to a screw 122 screwing in the outer end 123 of the corresponding cutter head carrier 23. Thus by the arrangement described each cutter head carrier 23 is free to turn on top of the corresponding slide 22 according to the shape of the pattern 90 against which abut the pins 110 and 111 of the two cutter head'carriers. The outer end 123 of each cutter head carrier 23 is provided with set screws 125 adapted to abut against stop lugs 126 extending upwardly from the slides 22. When the slides 22 are moved outward away from each other then the stop lugs126 engage the set screws 125 whereby the cutter head carriers 23 are moved along with the slides WVhen the slides 22 are moved inward toward each other then the springs 120 cause the cutter head carriers 23 to move along with the slides and until the pins 110 and 111 engage opposite sides of the pattern 90.

In order to move the slides 22 toward and from each other, use is made of two racks 130 and 131, of which one is attached to one of the slides and the other is secured to the other slide. The racks 130 and 131 engage a gear wheel 132 at the top and bottom thereof, and the gear wheel 132 is secured on a shaft 133 journaled in suitable bearings 134; formed on brackets 135 bolted or otherwise secured to the under side of the guideway 21 (see Figs. 4 and The bracket 135 is provided with guide rods 136 and 137 for the racks 130 and 131 to hold the latter correctly in mesh with the gear wheel 132. The end of the shaft 133 at the head of the machine is provided with a handle 1410 under the control of the operator, standing at this end of the machine, and the said handle 1 10 is provided with a weight 1 11 to turn theshaft 133 after the handle 110 has been swung from the left to the right past a vertical position. This turning movement given to the shaft 133 causes the gear wheel 132 to move the racks 130, 131 in opposite directions and the slides 22 toward each other whereby the cutter head carriers 23 are moved in a like direction to engage the cutter heads 26 with the bow member 30 to reduce and fashion the same. The cutter heads 26 are protected by the usual hoods 1 12 attached to the cutter head carriers 23, and a projecting shield 113 extends over the top of the rack 130 and the gear Wheel 132, as plainly indicated in Fig. 1.

The operation is as follows:

When the cutter heads 26 are in outer open position, as shown in Figs. 1 and 6, and the gripping members 40 and 41 are in open position then the operator presses with his body against the disk to move the supporting fork 60 from its normal inactive position into active position, as above explained, to allow of engaging the forward portion of the bow member 30 with the fork 60. The bend 35 of thebow 31 is next passed between the gripping members 10 and 11 and then the screw rod 51 is turned by the application of a wrench on the outer ends 52 of the set screw rod to move the gripping members toward each other and thus clamp the bend 35 of the bow between the gripping members. The operator now turns the hand wheel 87 to advance the bow holder and active position and out of the path of the cutter heads 26. The operator now swings the handle 140 outwardly, from the position shown in Fig. 1, to cause the gear wheel 132 to act on the racks 130 and 131 whereby the slides 22 are moved inward toward each other thereby moving the cutter head. car- .riers 23 and the cutter heads 26 along in the same direction. The continually revolving cutter heads 26 now engage and reduce the member 30 which latter is turned by the operator imparting a transverse swinging movement to the bow 31, the swinging motion giving a little more than a half turn to the member 30 and a corresponding half turn to the pattern 90. It will be noticed that the revolving cutter heads 26 now reduce the bow member 30 to the exact shape of the pattern 90 as the pins 110 and 111 engage the pattern and thus limit the movement of the cutter heads 26. lVhen the bow member 30 has been reduced and fashioned to the shape of the pattern 90 by the action of the cutter heads 26, then the operator swings the handle 1&0 back to its previous position, shown in Fig. 1, whereby the slides 22, the cutter head carriers 23 and the cutter heads 26 are moved outward away from each other back to the position shown in Fig. 4. The operator now turns the hand wheel 87 in a reverse direction to disengage the end of the bow member 30 from the tail stock spindle 32 and then the operator turns the screw rod 51 in a reverse direction to open the gripping members 40, ll and thus allow convenient removal of the bow from the machine. The bow can now be turned around to insert the other side member in the machine with a view to turn the same in the manner above described.

It will be noticed that by the arrangement described the attendant in charge is required to execute but very few simple manipulations and without leaving his position at the head of the machine.

It will further be noticed that the axis of the bow holder is suliiciently high up on the comparatively narrow machine to allow of readily swinging the bow 81 from one side to the other to impart more than a half turning motion to the side member 30 in position at the time in the machine.

Although the machine is primarily and mainly intended for turning the side members of a bow to a predetermined shape, it is evident that the machine may be used for turning other articles or parts thereof without deviating from the spirit of my invention.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a turning machine for turning the side member of a bow, revoluble cutter heads adapted to engage opposite sides of the side member of a bow, cutter head carriers on which the said cutter heads are journaled, transversely movable slides on which the said cutter head carriers are mounted to turn in a horizontal plane, manually controlled means moving the said slides toward and from each other, a revoluble pattern holder carrying a pattern adapted to be engaged on opposite sides by the said cutter head carriers, a bow holder adapted to carry the bow and to hold one end thereof between the said cutter heads, and a gearing connecting the said bow holder with the said pattern holder to turn the latter on imparting a swinging motion to the bow with the axis of the bow holder as the fulcrum.

2. In a turning machine for turning the side member of a bow, a revoluble bow holder adapted to hold a bow, a revoluble pattern holder adapted to hold a pattern and having its axis parallel to the axis of the said bow holder, at gearing Connecting the said bow holder withthe said pattern holder to turn the bow holder and the pattern holder in unison on imparting a swinging motion to the bow, revoluble cutter heads adapted to engage opposite sides of one end of the bow, cutter head carriers in which the cutter heads are journaled, pins on the said cutter head carriers adapted to engage opposite sides of the said pattern, at widely separated points, revoluble slides on which the said cutter head carriers are mounted, springs connecting the said cutter head carriers with the said slides to render the said cutter heads self-adjusting relative to the pattern, and means moving the said slides toward or from each other.

3. I11 a turning machine for turning the side member of a bow, a revoluble bow holder adapted to hold a bow, a revoluble pattern holderadapted to hold a pattern and having its axis parallel to the axis of the said bow. holder, agearing connecting the said bow holder with the said pattern holder to turn the bow holder and the pattern holder in unison on imparting a swinging motion to the bow, revoluble cutter heads adapted to engage opposite sides of one end of the bow, cutter head carriers in which the cutter heads are journaled, pins on the said cutter head carriersadapted to engage opposite sides of the pattern at separated points, horizontally revoluble slides supporting said cutter head carriers, springs connecting the said cutter head carriers with the said slides to render the said cutter heads self-adjusting relative to the pattern, racks attached to the said slides, a gear wheel in mesh at opposite sides with the said racks, a shaft carrying the said gear wheel, and a weighted arm attached to the said shaft.

4. In a turning machine for turning the side member of a bow, a cutter head, a cutter head carrier in which the cutter head is mounted to turn, the cutter head carrier having a base provided with rabbeted sides, a slide having arcuate portions engaging the sides of the cutter head carrier to support the latter and allow it to turn in a horizontal plane, springs connecting the said cutter head carrier with the said slide to allow the cutter head carrier to yield and to cause it to return to normal position, and pattern engaging means carried by the cutter carrier, adapted to engage a pattern at separated points.

5. In a bow end turning machine, a rectangular supporting frame, cutters disposed longitudinally of the frame and adapted to receive the end of the bow introduced from the head of the frame, a bow clamping and centering device adjustable from the head of the frame, a tail stock spindle, a saddle projectable beyond the tail stock spindle to support the end of the bow preliminary to centering on said tail stock spindle, and

actuating devices for the saddle, including a plunger with a head actuated at the head of the frame.

6. In a bow end turning machine, a rectangular supporting frame, longitudinally disposed cutters for reducing a bow end, a tail stock spindle, a clamp device for supporting the bow at the bend, a forwarding device disposed at the head of the frame for forwarding and centering the bow end upon the tail stock spindle, a projectable saddle coacting with the tail stock spindle for supporting the end of the bow preliminary to centering, and a saddle operating plunger terminating at the head of the frame beneath said forwarding device.

7. A. bow end turning machine including revolving cutters, means controlled from the head of the frame for moving the cutters laterally of the frame with respect to each other, a clamp for supporting a bow between the cutters, operating means for the clamp located at the head of the frame, a tail stock spindle, a forwarding device, located at the head of the frame for acting upon the clamping device to center the bow end on the tail stock spindle between said cutters, and a saddle coa-cting with the tail stock spindle, including a plunger operative from the head of the frame for projecting and retracting said saddle to support the end of the bow preliminary to centering by the forwarding device.

'8. In a bow end turning machine, a sup porting frame, transversely arranged guides 011 the frame, a pattern, slides movable upon the guides toward the pattern, cutter head carriers supported on the slides, feeler pins carried by each cutter head carrier for engaging the pattern and positioning said carrier accordingly, and articulated connections between said carriers and the respective slides permitting said carriers to swing in a horizontal plane, whereby said carriers are adapted to the pattern.

9. In a bow end turning machine, a supporting frame, a pattern, a guide arranged transversely on the frame, slides movable upon the guide toward the pattern, means for controlling the slides from the head of the frame, cutter head carriers carried by the slides, articulated and yielding connections between the cutter head carriers and the slides, and feeler pins carried by said carriers for engaging the pattern, the articulated and yielding connections of said carriers permitting the swinging of said carriers in a horizontal plane, and the adaptation of said carriers to the pattern with respect to the slides.

10. In a bow end turning machine, the combination of a pattern non-circular in cross section, slides movable toward and from the pattern, cutter head carriers carried by the slides and having a limited arcuate movement thereon, and feeler pins located on said carriers at opposite sides of the axis of arcuate movement for engaging the pattern and adjusting said carriers upon the re spective slides.

11. I11 a bow end turning machine, the combination of a pattern non-circular in cross section, slides movable toward and from said pattern, cutter head carriers mounted upon the slides with limited arcuate movement, revoluble cutter heads carried by said carriers, feeler pins mounted upon said carriers and adapted to contact the pattern at points opposite the axis of arcuate movement of said carriers and adjust said carriers with respect to the slides, and adjusting means engaging said pins.

12. In a bow end turning machine, the combination of a pattern non-circular in cross section, slides movable toward and from said pattern, cutter head carriers mounted upon said slides with a limited arcuate movement, feeler pins carried by said carriers at separated points and adapted to engage the pattern and thereby adjust said carriers upon the slides through said arcuate movement, a yieldable connection between said carriers and the slides for normally urging said carriers toward the pattern, and engageable stops carried by the slides and the carriers for limiting the movements of said carriers toward the pattern.

13. In a bow end turning machine, the combination of a pattern non-circular in cross section, slides movable toward the pattern, cutter head carriers having an articulated mounting upon the slides, each carrier having a plurality of holes, separated feeler pins loosely mounted in said holes for engaging said pattern, and controlling the position of said carriers and an adjusting means disposed at the base of each of said holes for engaging the feeler pins.

14;. In a bow end turning machine, the combination of a pattern non-circular in cross section, a slide movable toward said pattern, a stop 011 the slide, a cutter head carrier movably mounted upon the slide, separated feeler pins carried by said carrier engageable with said pattern, an abutment carried by the carrier engageable with the slide stop, a spring connected between the slide and said carrier, and manually operative means for conveying the slide to cause the engagement of the feeler pins with said pattern, and the creation of tension in said spring upon the separation of the abutment and the stop.

15. In a bow end turning machine including a rectangular frame, slides mounted upon said frame and arranged for trans verse movement in opposite directions, a pattern non-circular in cross section, adapted to be located between the slides, means operated from the head of the machine for controlling the movement of the slides, outter head carriers revolubly mounted upon said slides, and feeler pins mounted upon said carriers for engaging said pattern at separated points to revolve and adjust said carriers on the slides.

16. In a bow end turning machine including a rectangular frame, a slide mounted for transverse movement upon said frame and having rabbeted sides, a cutter head carrier carried by said slide, having arcuate slides engaging the rabbeted sides and having limited rotary movement thereon, stops carried by said slide, abutments carried by said carrier, said stops and abutments being arranged to limit the relative rotary movements, and springs connected between the slide and said carrier for urging the stops and abutments together.

17 In a bow end turning machine, a slide having erect side and front walls, a cutter head carrier revolubly carried by the slide and having depending side and rear walls, the Walls of the slide and carrier forming a chamber, stops carried by the slide in the chamber, abutments carried by the carrier extending into the chamber against the stops, and springs connected between the front wall of the slide and the rear wall of the carrier in the chamber, tending to hold the stops and abutments in engagement.

18. In a bow end turning machine, a slide having erect front and side walls, a cutter head carrier revolubly mounted upon the slide and having depending rear and side walls, said slide and carrier walls forming Gamers or thin patent may be obtained for a chamber, stops carried by the slide in the chamber, adjustable abutments carried by the rear wall of the carrier for engaging the stops, and springs located in the chamber,

connected at one end to the front wall of the slide, and having a connection to the rear wall of said carrier, said connection being adjustable for increasing or decreasing the tension of the springs.

19. In a bow end turning machine, a revoluble pattern support for supporting a pattern, a relatively broad gear carried by the pattern support, a bow clamp revolubly mounted above said support, a relatively narrow gear carried by said clamp in mesh with the pattern support gear, and a hand wheel for moving the clamp carried gear coaxially with respect to the pattern support gear.

20. In a bow end turning machine, a revoluble pattern support for supporting one end of a pattern, a relatively broad gear fixed on said support, cutters revoluble in a plane abovesaid pattern, a clamp having movable jaws for clamping a bow and supporting the end between the cutters, a revoluble clamp support, a gear carried by said clamp support in mesh with the pattern support gear, the pattern support being revolved upon manual operation of the bow, and a hand wheel and screw connection with the revoluble clamp support for advancing the clamp, the clamp support gear being slidable upon the relatively broad pattern support gear.

GEORGE A. ENSIGN.

five cents each, by addressing the "Gommissioner of Patenta,

Washington, D. G. 

